prep flat pipeline

bevy_derive/src/lib.rs

@@ -1,3 +1,5 @@
+extern crate proc_macro;
+
 use proc_macro::TokenStream;
 use syn::{parse_macro_input, DeriveInput, Data, DataStruct, Fields};
 use quote::quote;

src/render/passes/forward_flat/forward_flat.frag

@@ -0,0 +1,19 @@
+#version 450
+
+layout(location = 0) in vec3 v_Normal;
+layout(location = 1) in vec4 v_Position;
+
+layout(location = 0) out vec4 o_Target;
+
+layout(set = 0, binding = 0) uniform Camera {
+    mat4 ViewProj;
+};
+
+layout(set = 1, binding = 1) uniform Material {
+    vec4 Albedo;
+};
+
+void main() {
+    // multiply the light by material color
+    o_Target = Color;
+}

src/render/passes/forward_flat/forward_flat.vert

@@ -0,0 +1,26 @@
+#version 450
+
+layout(location = 0) in vec4 a_Pos;
+layout(location = 1) in vec4 a_Normal;
+layout(location = 2) in vec4 a_Uv;
+
+layout(location = 0) out vec3 v_Normal;
+layout(location = 1) out vec4 v_Position;
+
+layout(set = 0, binding = 0) uniform Camera {
+    mat4 ViewProj;
+};
+
+layout(set = 1, binding = 0) uniform Object {
+    mat4 Model;
+};
+
+layout(set = 1, binding = 1) uniform Material {
+    vec4 Albedo;
+};
+
+void main() {
+    v_Normal = mat3(Model) * vec3(a_Normal.xyz);
+    v_Position = Model * vec4(a_Pos);
+    gl_Position = ViewProj * v_Position;
+}

src/render/passes/forward_flat/mod.rs

@@ -0,0 +1,174 @@
+use crate::{asset::*, render::*};
+use legion::prelude::*;
+use wgpu::SwapChainOutput;
+
+pub struct ForwardFlatPipeline {
+    pub pipeline: Option<wgpu::RenderPipeline>,
+    pub depth_format: wgpu::TextureFormat,
+    pub bind_group: Option<wgpu::BindGroup>,
+    pub msaa_samples: usize,
+}
+
+impl ForwardFlatPipeline {
+    pub fn new(msaa_samples: usize) -> Self {
+        ForwardFlatPipeline {
+            pipeline: None,
+            bind_group: None,
+            msaa_samples,
+            depth_format: wgpu::TextureFormat::Depth32Float,
+        }
+    }
+}
+
+impl Pipeline for ForwardFlatPipeline {
+    fn initialize(&mut self, render_graph: &mut RenderGraphData, _: &mut World) {
+        let vs_bytes = shader::glsl_to_spirv(include_str!("forward_flat.vert"), shader::ShaderStage::Vertex);
+        let fs_bytes =
+            shader::glsl_to_spirv(include_str!("forward_flat.frag"), shader::ShaderStage::Fragment);
+
+        let bind_group_layout =
+            render_graph
+                .device
+                .create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
+                    bindings: &[
+                        wgpu::BindGroupLayoutBinding {
+                            binding: 0, // global
+                            visibility: wgpu::ShaderStage::VERTEX | wgpu::ShaderStage::FRAGMENT,
+                            ty: wgpu::BindingType::UniformBuffer { dynamic: false },
+                        },
+                        wgpu::BindGroupLayoutBinding {
+                            binding: 1, // lights
+                            visibility: wgpu::ShaderStage::VERTEX | wgpu::ShaderStage::FRAGMENT,
+                            ty: wgpu::BindingType::UniformBuffer { dynamic: false },
+                        },
+                    ],
+                });
+
+        self.bind_group = Some({
+            let forward_uniform_buffer = render_graph
+                .get_uniform_buffer(render_resources::FORWARD_UNIFORM_BUFFER_NAME)
+                .unwrap();
+            let light_uniform_buffer = render_graph
+                .get_uniform_buffer(render_resources::LIGHT_UNIFORM_BUFFER_NAME)
+                .unwrap();
+
+            // Create bind group
+            render_graph
+                .device
+                .create_bind_group(&wgpu::BindGroupDescriptor {
+                    layout: &bind_group_layout,
+                    bindings: &[
+                        wgpu::Binding {
+                            binding: 0,
+                            resource: forward_uniform_buffer.get_binding_resource(),
+                        },
+                        wgpu::Binding {
+                            binding: 1,
+                            resource: light_uniform_buffer.get_binding_resource(),
+                        },
+                    ],
+                })
+        });
+
+        let material_bind_group_layout = render_graph
+            .get_bind_group_layout(render_resources::MATERIAL_BIND_GROUP_LAYOUT_NAME)
+            .unwrap();
+
+        let pipeline_layout =
+            render_graph
+                .device
+                .create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
+                    bind_group_layouts: &[&bind_group_layout, material_bind_group_layout],
+                });
+
+        let vertex_buffer_descriptor = get_vertex_buffer_descriptor();
+
+        let vs_module = render_graph.device.create_shader_module(&vs_bytes);
+        let fs_module = render_graph.device.create_shader_module(&fs_bytes);
+
+        self.pipeline = Some(render_graph.device.create_render_pipeline(
+            &wgpu::RenderPipelineDescriptor {
+                layout: &pipeline_layout,
+                vertex_stage: wgpu::ProgrammableStageDescriptor {
+                    module: &vs_module,
+                    entry_point: "main",
+                },
+                fragment_stage: Some(wgpu::ProgrammableStageDescriptor {
+                    module: &fs_module,
+                    entry_point: "main",
+                }),
+                rasterization_state: Some(wgpu::RasterizationStateDescriptor {
+                    front_face: wgpu::FrontFace::Ccw,
+                    cull_mode: wgpu::CullMode::Back,
+                    depth_bias: 0,
+                    depth_bias_slope_scale: 0.0,
+                    depth_bias_clamp: 0.0,
+                }),
+                primitive_topology: wgpu::PrimitiveTopology::TriangleList,
+                color_states: &[wgpu::ColorStateDescriptor {
+                    format: render_graph.swap_chain_descriptor.format,
+                    color_blend: wgpu::BlendDescriptor::REPLACE,
+                    alpha_blend: wgpu::BlendDescriptor::REPLACE,
+                    write_mask: wgpu::ColorWrite::ALL,
+                }],
+                depth_stencil_state: Some(wgpu::DepthStencilStateDescriptor {
+                    format: self.depth_format,
+                    depth_write_enabled: true,
+                    depth_compare: wgpu::CompareFunction::Less,
+                    stencil_front: wgpu::StencilStateFaceDescriptor::IGNORE,
+                    stencil_back: wgpu::StencilStateFaceDescriptor::IGNORE,
+                    stencil_read_mask: 0,
+                    stencil_write_mask: 0,
+                }),
+                index_format: wgpu::IndexFormat::Uint16,
+                vertex_buffers: &[vertex_buffer_descriptor],
+                sample_count: self.msaa_samples as u32,
+                sample_mask: !0,
+                alpha_to_coverage_enabled: false,
+            },
+        ));
+    }
+    fn render(
+        &mut self,
+        render_graph: &RenderGraphData,
+        pass: &mut wgpu::RenderPass,
+        _: &SwapChainOutput,
+        world: &mut World,
+    ) {
+        pass.set_bind_group(0, self.bind_group.as_ref().unwrap(), &[]);
+
+        let mut mesh_storage = world.resources.get_mut::<AssetStorage<Mesh>>().unwrap();
+        let mut last_mesh_id = None;
+        let mesh_query =
+            <(Read<Material>, Read<Handle<Mesh>>)>::query().filter(!component::<Instanced>());
+        for (material, mesh) in mesh_query.iter(world) {
+            let current_mesh_id = mesh.id;
+
+            let mut should_load_mesh = last_mesh_id == None;
+            if let Some(last) = last_mesh_id {
+                should_load_mesh = last != current_mesh_id;
+            }
+
+            if should_load_mesh {
+                if let Some(mesh_asset) = mesh_storage.get(mesh.id) {
+                    mesh_asset.setup_buffers(&render_graph.device);
+                    pass.set_index_buffer(mesh_asset.index_buffer.as_ref().unwrap(), 0);
+                    pass.set_vertex_buffers(0, &[(&mesh_asset.vertex_buffer.as_ref().unwrap(), 0)]);
+                };
+            }
+
+            if let Some(ref mesh_asset) = mesh_storage.get(mesh.id) {
+                pass.set_bind_group(1, material.bind_group.as_ref().unwrap(), &[]);
+                pass.draw_indexed(0..mesh_asset.indices.len() as u32, 0, 0..1);
+            };
+
+            last_mesh_id = Some(current_mesh_id);
+        }
+    }
+
+    fn resize(&mut self, _: &RenderGraphData) {}
+
+    fn get_pipeline(&self) -> &wgpu::RenderPipeline {
+        self.pipeline.as_ref().unwrap()
+    }
+}

src/render/passes/mod.rs

@@ -1,10 +1,12 @@
 mod forward;
+mod forward_flat;
 mod forward_instanced;
 mod forward_shadow;
 mod shadow;
 mod ui;
 
 pub use forward::{ForwardPass, ForwardPipeline, ForwardUniforms};
+pub use forward_flat::*;
 pub use forward_instanced::ForwardInstancedPipeline;
 pub use forward_shadow::ForwardShadowPassNew;
 pub use shadow::ShadowPass;

src/render/render_graph_2/pipelines/forward/forward.frag

@@ -1,44 +1,19 @@
 #version 450
 
-const int MAX_LIGHTS = 10;
-
 layout(location = 0) in vec3 v_Normal;
 layout(location = 1) in vec4 v_Position;
 
 layout(location = 0) out vec4 o_Target;
 
-struct Light {
-    mat4 proj;
-    vec4 pos;
-    vec4 color;
-};
-
-layout(set = 0, binding = 0) uniform Globals {
+layout(set = 0, binding = 0) uniform Camera {
     mat4 ViewProj;
-    uvec4 NumLights;
-};
-layout(set = 0, binding = 1) uniform Lights {
-    Light SceneLights[MAX_LIGHTS];
 };
 
-layout(set = 1, binding = 0) uniform Entity {
-    mat4 World;
-    vec4 Color;
+layout(set = 1, binding = 1) uniform Material {
+    vec4 Albedo;
 };
 
 void main() {
-    vec3 normal = normalize(v_Normal);
-    vec3 ambient = vec3(0.05, 0.05, 0.05);
-    // accumulate color
-    vec3 color = ambient;
-    for (int i=0; i<int(NumLights.x) && i<MAX_LIGHTS; ++i) {
-        Light light = SceneLights[i];
-        // compute Lambertian diffuse term
-        vec3 light_dir = normalize(light.pos.xyz - v_Position.xyz);
-        float diffuse = max(0.0, dot(normal, light_dir));
-        // add light contribution
-        color += diffuse * light.color.xyz;
-    }
     // multiply the light by material color
-    o_Target = vec4(color, 1.0) * Color;
+    o_Target = Color;
 }

src/render/render_graph_2/pipelines/forward/forward.vert

@@ -7,17 +7,20 @@ layout(location = 2) in vec4 a_Uv;
 layout(location = 0) out vec3 v_Normal;
 layout(location = 1) out vec4 v_Position;
 
-layout(set = 0, binding = 0) uniform Globals {
+layout(set = 0, binding = 0) uniform Camera {
     mat4 ViewProj;
-    uvec4 NumLights;
 };
-layout(set = 1, binding = 0) uniform Entity {
-    mat4 World;
-    vec4 Color;
+
+layout(set = 1, binding = 0) uniform Object {
+    mat4 Model;
+};
+
+layout(set = 1, binding = 1) uniform Material {
+    vec4 Albedo;
 };
 
 void main() {
-    v_Normal = mat3(World) * vec3(a_Normal.xyz);
-    v_Position = World * vec4(a_Pos);
+    v_Normal = mat3(Model) * vec3(a_Normal.xyz);
+    v_Position = Model * vec4(a_Pos);
     gl_Position = ViewProj * v_Position;
 }